P0171 Diagnostic Trouble Code Discussion for January 2021
Fuel System Lean (Bank 1)
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| Help Request | Posted | |
| 2016 Toyota Tacoma TRD Sport 3.5L Poor Idle Quality, Stall, MIL Lamp on VIN: 3TMDZ5BN3G P0171: testing and results. Low fuel pressure test good. Sensor reading and gauge readings match and are in spec. High pressure is in spec on sensor readings but at idle high pressure will keep climbing to 2000psi even with pump unplugged. |
January 06, 2021 | |
| 2006 Subaru Forester X 2.5L MIL Lamp on VIN: JF1SG63696 P0171: Fuel System Too Lean (Bank 1). ... park, put it in drive at stop and stft go up to 30. Put it park again and stft goes down immediatly to single didgets ,close to zero. If at a stop light longer than a minute, check engine lite will come back on with p0171. Smoked induction system with ... |
January 07, 2021 | |
| 2016 Toyota Tacoma TRD Sport 3.5L Poor Idle Quality, Stall, MIL Lamp on VIN: 3TMDZ5BN3G P0171: testing and results. Low fuel pressure test good. Sensor reading and gauge readings match and are in spec. High pressure is in spec on sensor readings but at idle high pressure will keep climbing to 2000psi even with pump unplugged. |
January 07, 2021 | |
| 2012 GMC Acadia SLT 3.6L Poor Idle Quality, Surge, MIL Lamp on VIN: 1GKKVRED4C P0171: Bank 1 system lean. ... your help.I am in need of your input on this vehicle. It came to the shop with a S.E.S. light on and a little surge at cruise and a little low on power. I scaned the system for DTC's and came up with the codes that I listed below. I scaned the datalis... |
January 13, 2021 | |
| 2012 GMC Acadia SLT 3.6L Poor Idle Quality, Surge, MIL Lamp on VIN: 1GKKVRED4C P0171: Bank 1 system lean. Hello Group, Thank you in advance for your help.I am in need of your input on this vehicle. It came to the shop with a S.E.S. light on and a little surge at cruise and a little low on power. I scaned the system for DTC's and came up with the codes that I l... |
January 14, 2021 | |
| 2008 Toyota Corolla S 1.8L MIL Lamp on, P0171 VIN: 1NXBR32E58 P0171: . I have a p0171 that I am having trouble diagnosing. When I first start this vehicle up, STFT is -10 while LTFT is +10. Then as it warms up, STFT is near 0 and LTFT is around +9. While reading freeze frame data, I noticed that the STFT and LTFT is +20-30, a... |
January 14, 2021 | |
| 2013 Toyota Tacoma 4.0L Stall, MIL Lamp on VIN: 3TMLU4EN8D P0171: bank 1 lean. need help with this low mileage tacoma,starts and will stall the first start of the day then fine rest of the day.A known good mass air flow sensor was tried and made no difference,checked for vacuum leaks and found none.did remove upper plenum and replace... |
January 14, 2021 | |
| 2008 Toyota Corolla S 1.8L MIL Lamp on, P0171 VIN: 1NXBR32E58 P0171: . I have a p0171 that I am having trouble diagnosing. When I first start this vehicle up, STFT is -10 while LTFT is +10. Then as it warms up, STFT is near 0 and LTFT is around +9. While reading freeze frame data, I noticed that the STFT and LTFT is +20-30, a... |
January 15, 2021 | |
| 2002 Ford F-150 XL 4.2L No Start VIN: 1FTRF17292 P0171: Rich mixture. ... in almost a year ago and was running rough and had lean codes and MAF codes. Put on MAF and new intake gaskets. Everything ran good for several months. Customer called a couple of weeks ago and said when started on cold morning would not hardly run. T... |
January 19, 2021 | |
| 2007 Chevrolet Silverado 2500 HD WT 6.0L MIL Lamp on VIN: 1GCHK24K67 P0171: Fuel Trim System Lean (Bank 1). This one has me stumped at the moment. The fuel trims go positive when accelerating and at idle all is well. The O2's drop to 0 on acceleration. It appeared to be fuel delivery issue but now it has a new fuel pump assembly, good volume and pressure. The MA... |
January 20, 2021 | |
| 2007 Chevrolet Silverado 2500 HD WT 6.0L MIL Lamp on VIN: 1GCHK24K67 P0171: Fuel System Lean (Bank 1). This one has me stumped at the moment. The fuel trims go positive when accelerating and at idle all is well. The O2's drop to 0 on acceleration. It appeared to be fuel delivery issue but now it has a new fuel pump assembly, good volume and pressure. The MA... |
January 21, 2021 | |
| 2015 Ford Explorer Sport 3.5L MIL Lamp on VIN: 1FM5K8GT6F P0171: bank 1 lean. both banks 20-25 percent positive long term fuel trim, under all conditions. its been to multiple shops, always comes back. can't find any air leaks runs awesome besides the fuel trims All VCT pids are right on, around 0 percent error Thanks f... |
January 28, 2021 | |
| 1997 Ford Ranger Splash 2.3L Poor Idle Quality, Misfire VIN: 1FTCR10AXV P0171: Lean exhaust. OK this truck runs fine, but intermittently will idle rough and run bad. The truck had a lean code in history. The fuel trim numbers are very high, Long term is at 30, and short term jumps around 20, and the O2's are lazy. When you get it to mess up, in wa... |
January 29, 2021 |
